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CA940187A - Visual display devices - Google Patents

Visual display devices

Info

Publication number
CA940187A
CA940187A CA113,247A CA113247A CA940187A CA 940187 A CA940187 A CA 940187A CA 113247 A CA113247 A CA 113247A CA 940187 A CA940187 A CA 940187A
Authority
CA
Canada
Prior art keywords
display devices
visual display
visual
devices
display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA113,247A
Other versions
CA113247S (en
Inventor
Frank Walters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferranti International PLC
Original Assignee
Ferranti PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferranti PLC filed Critical Ferranti PLC
Application granted granted Critical
Publication of CA940187A publication Critical patent/CA940187A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current
    • H01J17/492—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with crossed electrodes
CA113,247A 1970-05-20 1971-05-18 Visual display devices Expired CA940187A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2435970 1970-05-20
GB2619870 1970-05-30

Publications (1)

Publication Number Publication Date
CA940187A true CA940187A (en) 1974-01-15

Family

ID=26257074

Family Applications (1)

Application Number Title Priority Date Filing Date
CA113,247A Expired CA940187A (en) 1970-05-20 1971-05-18 Visual display devices

Country Status (2)

Country Link
CA (1) CA940187A (en)
NL (1) NL169655C (en)

Also Published As

Publication number Publication date
NL169655B (en) 1982-03-01
NL7106937A (en) 1971-11-23
NL169655C (en) 1982-08-02

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